Aluminum

Once your furnace is eventually running, you will probably want to melt down scrap aluminum you hav found.

Here is some tips for testing if the metal is aluminum or not:

• Non magnetic 
• Light metal
• Easily scratched with steel
• Easily carved with a sharp knife
• Silver color (under any coatings) 
• Melts about 600C 
• Tin/lead solder will not stick (or just barely) to it